This part, together and in conjunction with parts 1 through 4 of this chapter, applies to the making of premium rates for workers' compensation insurance issued under compensation plan No. 2 and plan No. 3 of the Workers' Compensation Act, Title 39, chapter 71, part 22 and part 23, respectively, or related employer's liability insurance, but does not apply to reinsurance.
§ 33-16-1002, MCA